The 32-year-old mum-of-three has been enjoying the company of handsome Argentine model Leandro Penna.

The couple hit it off when they were introduced at Elton John's post-Oscars bash and immediately sparked reports of a romance when they were photographed embracing while waiting for their car outside.

Keen to show off her 25-year-old companion, Katie uploaded a picture to her Twitter account the next morning (below) with the caption: "Isn't he pretty? Such a cute boy."

A fortnight on, and things are heating up.

This week, according to the Sun, Leandro jetted in to London at Katie's expense.

After landing at Heathrow on Monday morning, he was whisked to the home of her best friend Gary Cockerill in Hyde Park, central London.

The new couple then went out for a dinner date with Gary and his partner Phil Turner at a curry restaurant in Marylebone.

Again Katie marked the occasion with a Twitter photograph (below), cosying up to her model man for the snap.

The following morning, the pair were seen loading up Leandro's bags into a car, before reportedly returning to Katie's Surrey mansion.

Her estranged husband Alex Reid is believed to have only moved out of their marital home last week and is now staying at his mum's house in Aldershot.

He is said to have been left devastated by the romance, allegedly claiming that Katie has repeatedly told him that there is hope for their marriage, despite the fact she launched divorce proceedings last month.

"He is being treated like dirt," one friend told the Sun. "She keeps him hanging on, then has the nerve to take another man into their marital home."

Katie and cage fighter Alex started dating in July 2009 and were married in a Las Vegas ceremony in February 2010. In January they announced their separation.